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The 2020 Loyalton Fire was a large
wildfire A wildfire, forest fire, or a bushfire is an unplanned and uncontrolled fire in an area of Combustibility and flammability, combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identified as a ...
in
Lassen Lassen is a Danish language, Danish and Norwegian language, Norwegian patronymic surname meaning "son of Lars" (equivalent of Laurentius), and thus a parallel form of the more common surname Larsen. Notable people with the surname include: * Ander ...
, Plumas and Sierra counties in
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
and
Washoe County Washoe County () is a county in the U.S. state of Nevada. As of the 2020 census, the population was 486,492, making it Nevada's second-most populous county. Its county seat is Reno. Washoe County is included in the Reno, NV Metropolitan Statis ...
in
Nevada Nevada ( ; ) is a landlocked state in the Western United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive, th ...
. After it was ignited by lightning on August 14, 2020, the fire burned in the Tahoe National Forest and the Humboldt-Toiyabe National Forest before it was fully contained on August 26. The Loyalton Fire was notable for generating three fire tornadoes on August 15, necessitating first-of-their-kind warnings by the
National Weather Service The National Weather Service (NWS) is an Government agency, agency of the Federal government of the United States, United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weathe ...
.


Progression

The fire was started by lightning strikes east of
Loyalton Loyalton is the only incorporated city in Sierra County, California, United States. At the 2020 census, the population was 740, reflecting a decline of 29 from the 769 counted in 2010. The ZIP code for the community is 96118. The town is near ...
along the eastern edge of the
Sierra Valley Sierra Valley is a large mountain valley located east of the crest of California's Sierra Nevada mountain range in Plumas and Sierra Counties, north of Interstate 80. Geography An intermontane valley at approximately elevation, Sierra Va ...
, near Mount Ina Coolbrith on the Tahoe National Forest. A fire lookout on Smith Peak in the
Plumas National Forest Plumas National Forest is a 1,146,000-acre (464,000 ha) National forest (United States), United States national forest located in northern California at the northern terminus of the Sierra Nevada mountain range. The Forest was named after i ...
first reported smoke from the burgeoning fire to the Plumas dispatch center in Quincy at 4:27 p.m. PDT on Friday, August 14. Limited road access prevented ground crews from getting near the fire for several hours. Despite the efforts of helicopters and air tankers, by 7:28 p.m. the fire had burned . On August 15, at around 2:35 p.m. PDT, high winds and thunderstorm activity spawned three fire tornadoes, two of which were rated EF1. The
National Weather Service The National Weather Service (NWS) is an Government agency, agency of the Federal government of the United States, United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weathe ...
issued its first-ever fire tornado warning resulting from the building
pyrocumulonimbus The cumulonimbus flammagenitus cloud (CbFg), also known as the pyrocumulonimbus cloud, is a type of cumulonimbus cloud that forms above a source of heat, such as a wildfire, nuclear explosion, or volcanic eruption, and may sometimes even exting ...
cloud in response to the incident, which went into effect for
Lassen County Lassen County ( ) is a county located in the northeastern portion of the U.S. state of California. As of the 2020 census, the population was 32,730, and was estimated to be 28,340 in 2024, Its county seat and the largest city is Susanville. ...
. By the morning of August 16, the fire had expanded to . Evacuation orders were issued for areas in Lassen County south of SR 70 and west of
US 395 U.S. Route 395 (US 395), also known as U.S. Highway 395, is a north–south United States Numbered Highway that traverses the inland areas of the western states of California, Nevada, Oregon, and Washington. It travels for over from a junctio ...
. SR 70 was closed between SR 49 and US 395 as fire crews worked to prevent the fire from spreading north of
Beckwourth Pass Beckwourth Pass is the lowest mountain pass in the Sierra Nevada mountain range at an elevation of . Geography Beckwourth Pass is located at the north eastern edge of Sierra Valley at Chilcoot-Vinton, California near the border between Pl ...
. The fire briefly jumped north of SR 70 and east of US 395 but was quickly stopped in those directions. By the evening of August 16, helped by strong winds, the fire had burned . Evacuation orders were expanded to Balls Canyon Road, Long Valley Road, Bordertown, Copperfield, and
Cold Springs Cold Spring, Cold Springs, Coldspring, or Coldsprings may refer to: Places Canada * Cold Springs, Manitoulin District, Ontario * Cold Springs, Northumberland County, Ontario * Coldspring House, British Columbia, Canada (also known as Coldsprin ...
as the fire spread east into Nevada and the Humboldt-Toiyabe National Forest. About 580 firefighters, 42 engines and 6 aircraft were on the scene. Crews had made progress on the southeast flank of the fire on August 17, mandatory evacuations were lifted for Cold Springs, and SR 70 was reopened. The Dog Valley and Long Valley areas of the Carson Ranger District on the Humboldt-Toiyabe National Forest were closed to recreational access. By evening, advisory evacuation orders were in place for Loyalton, Chilcoot, Vinton, and Sierra Brooks. Lightning strikes started several new fires to the south around 7:30 pm, but rain after midnight helped slow fire activity. As of August 17, five homes and six other structures had been destroyed. On August 18, the fire had been largely contained in the north and east, and mandatory evacuations were lifted in Lassen County. However, it continued spreading rapidly to the south and west, largely due to the lightning strikes there the previous day. The fire grew to and was 10 percent contained. High winds continued throughout August 19, but crews had managed to slow the fire spread considerably. Evacuation advisories were lifted for Cold Springs and Bordertown. By the evening, evacuation advisories were also lifted for Chilcoot, Vinton and Loyalton, although evacuation orders remained in place for Balls Canyon Road, Long Valley Road, and Copperfield, and an evacuation advisory for Sierra Brooks. On the morning of August 20, evacuation advisories were lifted for Sierra Brooks and Copperfield. As of 5:44 pm on August 20, the fire had burned and was 60 percent contained. Air quality continued to be extremely poor in Sierra Valley and Reno, with visibility highly impaired by smoke. On the morning of August 21, evacuation orders remained in place for Balls Canyon Road and Long Valley Road. The fire had burned and remained at 60 percent containment. At 6:30 am on August 22, the fire was at and was 75 percent contained. Wind activity decreased significantly over the weekend helping fire crews to expand containment. A total of six homes and 29 other structures were reported destroyed. All evacuation orders were lifted as of this time, though the Dog Valley area of the Humboldt-Toiyabe National Forest remained closed. The fire was declared 100 percent contained on August 26. It burned in total.


Effects

The Loyalton Fire destroyed 35 structures. No other buildings were damaged. The toll included six homes and 29 outbuildings, most of which were abandoned and lay near the north end of the fire.


References

{{California wildfires 2020 California wildfires Wildfires in Lassen County, California Wildfires in Plumas County, California Wildfires in Sierra County, California